1 files changed, 1 insertions, 1 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 9197ff12ef5..fb0f948474d 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -1727,7 +1727,7 @@ static EMACS_INT total_string_bytes;
    a pointer to the `u.data' member of its sdata structure; the
    structure starts at a constant offset in front of that.  */
 
-#define SDATA_OF_STRING(S) ptr_bounds_init ((sdata *) ((S)->u.s.data \
+#define SDATA_OF_STRING(S) ((sdata *) ptr_bounds_init ((S)->u.s.data \
                                                        - SDATA_DATA_OFFSET))